1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Hodge-podge collection of knfsd-related stuff.
4 * I will sort this out later.
5 *
6 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
7 */
8
9 #ifndef LINUX_NFSD_NFSD_H
10 #define LINUX_NFSD_NFSD_H
11
12 #include <linux/types.h>
13 #include <linux/mount.h>
14
15 #include <linux/nfs.h>
16 #include <linux/nfs2.h>
17 #include <linux/nfs3.h>
18 #include <linux/nfs4.h>
19 #include <linux/sunrpc/svc.h>
20 #include <linux/sunrpc/svc_xprt.h>
21 #include <linux/sunrpc/msg_prot.h>
22 #include <linux/sunrpc/addr.h>
23
24 #include <uapi/linux/nfsd/debug.h>
25
26 #include "netns.h"
27 #include "export.h"
28 #include "stats.h"
29
30 #undef ifdebug
31 #ifdef CONFIG_SUNRPC_DEBUG
32 # define ifdebug(flag) if (nfsd_debug & NFSDDBG_##flag)
33 #else
34 # define ifdebug(flag) if (0)
35 #endif
36
37 /*
38 * nfsd version
39 */
40 #define NFSD_SUPPORTED_MINOR_VERSION 2
41 /*
42 * Maximum blocksizes supported by daemon under various circumstances.
43 */
44 #define NFSSVC_MAXBLKSIZE RPCSVC_MAXPAYLOAD
45 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
46 #define NFSSVC_MAXBLKSIZE_V2 (8*1024)
47
48
49 /*
50 * Largest number of bytes we need to allocate for an NFS
51 * call or reply. Used to control buffer sizes. We use
52 * the length of v3 WRITE, READDIR and READDIR replies
53 * which are an RPC header, up to 26 XDR units of reply
54 * data, and some page data.
55 *
56 * Note that accuracy here doesn't matter too much as the
57 * size is rounded up to a page size when allocating space.
58 */
59 #define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
60
61 struct readdir_cd {
62 __be32 err; /* 0, nfserr, or nfserr_eof */
63 };
64
65
66 extern struct svc_program nfsd_program;
67 extern const struct svc_version nfsd_version2, nfsd_version3,
68 nfsd_version4;
69 extern struct mutex nfsd_mutex;
70 extern spinlock_t nfsd_drc_lock;
71 extern unsigned long nfsd_drc_max_mem;
72 extern unsigned long nfsd_drc_mem_used;
73
74 extern const struct seq_operations nfs_exports_op;
75
76 /*
77 * Common void argument and result helpers
78 */
79 struct nfsd_voidargs { };
80 struct nfsd_voidres { };
81 int nfssvc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p);
82 int nfssvc_encode_voidres(struct svc_rqst *rqstp, __be32 *p);
83
84 /*
85 * Function prototypes.
86 */
87 int nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
88 int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
89
90 int nfsd_nrthreads(struct net *);
91 int nfsd_nrpools(struct net *);
92 int nfsd_get_nrthreads(int n, int *, struct net *);
93 int nfsd_set_nrthreads(int n, int *, struct net *);
94 int nfsd_pool_stats_open(struct inode *, struct file *);
95 int nfsd_pool_stats_release(struct inode *, struct file *);
96 void nfsd_shutdown_threads(struct net *net);
97
98 void nfsd_destroy(struct net *net);
99
100 bool i_am_nfsd(void);
101
102 struct nfsdfs_client {
103 struct kref cl_ref;
104 void (*cl_release)(struct kref *kref);
105 };
106
107 struct nfsdfs_client *get_nfsdfs_client(struct inode *);
108 struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
109 struct nfsdfs_client *ncl, u32 id,
110 const struct tree_descr *,
111 struct dentry **fdentries);
112 void nfsd_client_rmdir(struct dentry *dentry);
113
114
115 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
116 #ifdef CONFIG_NFSD_V2_ACL
117 extern const struct svc_version nfsd_acl_version2;
118 #else
119 #define nfsd_acl_version2 NULL
120 #endif
121 #ifdef CONFIG_NFSD_V3_ACL
122 extern const struct svc_version nfsd_acl_version3;
123 #else
124 #define nfsd_acl_version3 NULL
125 #endif
126 #endif
127
128 struct nfsd_net;
129
130 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
131 int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
132 int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
133 void nfsd_reset_versions(struct nfsd_net *nn);
134 int nfsd_create_serv(struct net *net);
135
136 extern int nfsd_max_blksize;
137
nfsd_v4client(struct svc_rqst * rq)138 static inline int nfsd_v4client(struct svc_rqst *rq)
139 {
140 return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
141 }
142 static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst * rqstp)143 nfsd_user_namespace(const struct svc_rqst *rqstp)
144 {
145 const struct cred *cred = rqstp->rq_xprt->xpt_cred;
146 return cred ? cred->user_ns : &init_user_ns;
147 }
148
149 /*
150 * NFSv4 State
151 */
152 #ifdef CONFIG_NFSD_V4
153 extern unsigned long max_delegations;
154 int nfsd4_init_slabs(void);
155 void nfsd4_free_slabs(void);
156 int nfs4_state_start(void);
157 int nfs4_state_start_net(struct net *net);
158 void nfs4_state_shutdown(void);
159 void nfs4_state_shutdown_net(struct net *net);
160 int nfs4_reset_recoverydir(char *recdir);
161 char * nfs4_recoverydir(void);
162 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
163 #else
nfsd4_init_slabs(void)164 static inline int nfsd4_init_slabs(void) { return 0; }
nfsd4_free_slabs(void)165 static inline void nfsd4_free_slabs(void) { }
nfs4_state_start(void)166 static inline int nfs4_state_start(void) { return 0; }
nfs4_state_start_net(struct net * net)167 static inline int nfs4_state_start_net(struct net *net) { return 0; }
nfs4_state_shutdown(void)168 static inline void nfs4_state_shutdown(void) { }
nfs4_state_shutdown_net(struct net * net)169 static inline void nfs4_state_shutdown_net(struct net *net) { }
nfs4_reset_recoverydir(char * recdir)170 static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
nfs4_recoverydir(void)171 static inline char * nfs4_recoverydir(void) {return NULL; }
nfsd4_spo_must_allow(struct svc_rqst * rqstp)172 static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
173 {
174 return false;
175 }
176 #endif
177
178 /*
179 * lockd binding
180 */
181 void nfsd_lockd_init(void);
182 void nfsd_lockd_shutdown(void);
183
184
185 /*
186 * These macros provide pre-xdr'ed values for faster operation.
187 */
188 #define nfs_ok cpu_to_be32(NFS_OK)
189 #define nfserr_perm cpu_to_be32(NFSERR_PERM)
190 #define nfserr_noent cpu_to_be32(NFSERR_NOENT)
191 #define nfserr_io cpu_to_be32(NFSERR_IO)
192 #define nfserr_nxio cpu_to_be32(NFSERR_NXIO)
193 #define nfserr_eagain cpu_to_be32(NFSERR_EAGAIN)
194 #define nfserr_acces cpu_to_be32(NFSERR_ACCES)
195 #define nfserr_exist cpu_to_be32(NFSERR_EXIST)
196 #define nfserr_xdev cpu_to_be32(NFSERR_XDEV)
197 #define nfserr_nodev cpu_to_be32(NFSERR_NODEV)
198 #define nfserr_notdir cpu_to_be32(NFSERR_NOTDIR)
199 #define nfserr_isdir cpu_to_be32(NFSERR_ISDIR)
200 #define nfserr_inval cpu_to_be32(NFSERR_INVAL)
201 #define nfserr_fbig cpu_to_be32(NFSERR_FBIG)
202 #define nfserr_nospc cpu_to_be32(NFSERR_NOSPC)
203 #define nfserr_rofs cpu_to_be32(NFSERR_ROFS)
204 #define nfserr_mlink cpu_to_be32(NFSERR_MLINK)
205 #define nfserr_opnotsupp cpu_to_be32(NFSERR_OPNOTSUPP)
206 #define nfserr_nametoolong cpu_to_be32(NFSERR_NAMETOOLONG)
207 #define nfserr_notempty cpu_to_be32(NFSERR_NOTEMPTY)
208 #define nfserr_dquot cpu_to_be32(NFSERR_DQUOT)
209 #define nfserr_stale cpu_to_be32(NFSERR_STALE)
210 #define nfserr_remote cpu_to_be32(NFSERR_REMOTE)
211 #define nfserr_wflush cpu_to_be32(NFSERR_WFLUSH)
212 #define nfserr_badhandle cpu_to_be32(NFSERR_BADHANDLE)
213 #define nfserr_notsync cpu_to_be32(NFSERR_NOT_SYNC)
214 #define nfserr_badcookie cpu_to_be32(NFSERR_BAD_COOKIE)
215 #define nfserr_notsupp cpu_to_be32(NFSERR_NOTSUPP)
216 #define nfserr_toosmall cpu_to_be32(NFSERR_TOOSMALL)
217 #define nfserr_serverfault cpu_to_be32(NFSERR_SERVERFAULT)
218 #define nfserr_badtype cpu_to_be32(NFSERR_BADTYPE)
219 #define nfserr_jukebox cpu_to_be32(NFSERR_JUKEBOX)
220 #define nfserr_denied cpu_to_be32(NFSERR_DENIED)
221 #define nfserr_deadlock cpu_to_be32(NFSERR_DEADLOCK)
222 #define nfserr_expired cpu_to_be32(NFSERR_EXPIRED)
223 #define nfserr_bad_cookie cpu_to_be32(NFSERR_BAD_COOKIE)
224 #define nfserr_same cpu_to_be32(NFSERR_SAME)
225 #define nfserr_clid_inuse cpu_to_be32(NFSERR_CLID_INUSE)
226 #define nfserr_stale_clientid cpu_to_be32(NFSERR_STALE_CLIENTID)
227 #define nfserr_resource cpu_to_be32(NFSERR_RESOURCE)
228 #define nfserr_moved cpu_to_be32(NFSERR_MOVED)
229 #define nfserr_nofilehandle cpu_to_be32(NFSERR_NOFILEHANDLE)
230 #define nfserr_minor_vers_mismatch cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
231 #define nfserr_share_denied cpu_to_be32(NFSERR_SHARE_DENIED)
232 #define nfserr_stale_stateid cpu_to_be32(NFSERR_STALE_STATEID)
233 #define nfserr_old_stateid cpu_to_be32(NFSERR_OLD_STATEID)
234 #define nfserr_bad_stateid cpu_to_be32(NFSERR_BAD_STATEID)
235 #define nfserr_bad_seqid cpu_to_be32(NFSERR_BAD_SEQID)
236 #define nfserr_symlink cpu_to_be32(NFSERR_SYMLINK)
237 #define nfserr_not_same cpu_to_be32(NFSERR_NOT_SAME)
238 #define nfserr_lock_range cpu_to_be32(NFSERR_LOCK_RANGE)
239 #define nfserr_restorefh cpu_to_be32(NFSERR_RESTOREFH)
240 #define nfserr_attrnotsupp cpu_to_be32(NFSERR_ATTRNOTSUPP)
241 #define nfserr_bad_xdr cpu_to_be32(NFSERR_BAD_XDR)
242 #define nfserr_openmode cpu_to_be32(NFSERR_OPENMODE)
243 #define nfserr_badowner cpu_to_be32(NFSERR_BADOWNER)
244 #define nfserr_locks_held cpu_to_be32(NFSERR_LOCKS_HELD)
245 #define nfserr_op_illegal cpu_to_be32(NFSERR_OP_ILLEGAL)
246 #define nfserr_grace cpu_to_be32(NFSERR_GRACE)
247 #define nfserr_no_grace cpu_to_be32(NFSERR_NO_GRACE)
248 #define nfserr_reclaim_bad cpu_to_be32(NFSERR_RECLAIM_BAD)
249 #define nfserr_badname cpu_to_be32(NFSERR_BADNAME)
250 #define nfserr_cb_path_down cpu_to_be32(NFSERR_CB_PATH_DOWN)
251 #define nfserr_locked cpu_to_be32(NFSERR_LOCKED)
252 #define nfserr_wrongsec cpu_to_be32(NFSERR_WRONGSEC)
253 #define nfserr_badiomode cpu_to_be32(NFS4ERR_BADIOMODE)
254 #define nfserr_badlayout cpu_to_be32(NFS4ERR_BADLAYOUT)
255 #define nfserr_bad_session_digest cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
256 #define nfserr_badsession cpu_to_be32(NFS4ERR_BADSESSION)
257 #define nfserr_badslot cpu_to_be32(NFS4ERR_BADSLOT)
258 #define nfserr_complete_already cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
259 #define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
260 #define nfserr_deleg_already_wanted cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
261 #define nfserr_back_chan_busy cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
262 #define nfserr_layouttrylater cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
263 #define nfserr_layoutunavailable cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
264 #define nfserr_nomatching_layout cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
265 #define nfserr_recallconflict cpu_to_be32(NFS4ERR_RECALLCONFLICT)
266 #define nfserr_unknown_layouttype cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
267 #define nfserr_seq_misordered cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
268 #define nfserr_sequence_pos cpu_to_be32(NFS4ERR_SEQUENCE_POS)
269 #define nfserr_req_too_big cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
270 #define nfserr_rep_too_big cpu_to_be32(NFS4ERR_REP_TOO_BIG)
271 #define nfserr_rep_too_big_to_cache cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
272 #define nfserr_retry_uncached_rep cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
273 #define nfserr_unsafe_compound cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
274 #define nfserr_too_many_ops cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
275 #define nfserr_op_not_in_session cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
276 #define nfserr_hash_alg_unsupp cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
277 #define nfserr_clientid_busy cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
278 #define nfserr_pnfs_io_hole cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
279 #define nfserr_seq_false_retry cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
280 #define nfserr_bad_high_slot cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
281 #define nfserr_deadsession cpu_to_be32(NFS4ERR_DEADSESSION)
282 #define nfserr_encr_alg_unsupp cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
283 #define nfserr_pnfs_no_layout cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
284 #define nfserr_not_only_op cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
285 #define nfserr_wrong_cred cpu_to_be32(NFS4ERR_WRONG_CRED)
286 #define nfserr_wrong_type cpu_to_be32(NFS4ERR_WRONG_TYPE)
287 #define nfserr_dirdeleg_unavail cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
288 #define nfserr_reject_deleg cpu_to_be32(NFS4ERR_REJECT_DELEG)
289 #define nfserr_returnconflict cpu_to_be32(NFS4ERR_RETURNCONFLICT)
290 #define nfserr_deleg_revoked cpu_to_be32(NFS4ERR_DELEG_REVOKED)
291 #define nfserr_partner_notsupp cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
292 #define nfserr_partner_no_auth cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
293 #define nfserr_union_notsupp cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
294 #define nfserr_offload_denied cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
295 #define nfserr_wrong_lfs cpu_to_be32(NFS4ERR_WRONG_LFS)
296 #define nfserr_badlabel cpu_to_be32(NFS4ERR_BADLABEL)
297 #define nfserr_file_open cpu_to_be32(NFS4ERR_FILE_OPEN)
298 #define nfserr_xattr2big cpu_to_be32(NFS4ERR_XATTR2BIG)
299 #define nfserr_noxattr cpu_to_be32(NFS4ERR_NOXATTR)
300
301 /* error codes for internal use */
302 /* if a request fails due to kmalloc failure, it gets dropped.
303 * Client should resend eventually
304 */
305 #define nfserr_dropit cpu_to_be32(30000)
306 /* end-of-file indicator in readdir */
307 #define nfserr_eof cpu_to_be32(30001)
308 /* replay detected */
309 #define nfserr_replay_me cpu_to_be32(11001)
310 /* nfs41 replay detected */
311 #define nfserr_replay_cache cpu_to_be32(11002)
312
313 /* Check for dir entries '.' and '..' */
314 #define isdotent(n, l) (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
315
316 #ifdef CONFIG_NFSD_V4
317
318 /* before processing a COMPOUND operation, we have to check that there
319 * is enough space in the buffer for XDR encode to succeed. otherwise,
320 * we might process an operation with side effects, and be unable to
321 * tell the client that the operation succeeded.
322 *
323 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
324 * needed to encode an "ordinary" _successful_ operation. (GETATTR,
325 * READ, READDIR, and READLINK have their own buffer checks.) if we
326 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
327 *
328 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
329 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
330 * care is taken to ensure that we never fall below this level for any
331 * reason.
332 */
333 #define COMPOUND_SLACK_SPACE 140 /* OP_GETFH */
334 #define COMPOUND_ERR_SLACK_SPACE 16 /* OP_SETATTR */
335
336 #define NFSD_LAUNDROMAT_MINTIMEOUT 1 /* seconds */
337
338 /*
339 * The following attributes are currently not supported by the NFSv4 server:
340 * ARCHIVE (deprecated anyway)
341 * HIDDEN (unlikely to be supported any time soon)
342 * MIMETYPE (unlikely to be supported any time soon)
343 * QUOTA_* (will be supported in a forthcoming patch)
344 * SYSTEM (unlikely to be supported any time soon)
345 * TIME_BACKUP (unlikely to be supported any time soon)
346 * TIME_CREATE (unlikely to be supported any time soon)
347 */
348 #define NFSD4_SUPPORTED_ATTRS_WORD0 \
349 (FATTR4_WORD0_SUPPORTED_ATTRS | FATTR4_WORD0_TYPE | FATTR4_WORD0_FH_EXPIRE_TYPE \
350 | FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE | FATTR4_WORD0_LINK_SUPPORT \
351 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR | FATTR4_WORD0_FSID \
352 | FATTR4_WORD0_UNIQUE_HANDLES | FATTR4_WORD0_LEASE_TIME | FATTR4_WORD0_RDATTR_ERROR \
353 | FATTR4_WORD0_ACLSUPPORT | FATTR4_WORD0_CANSETTIME | FATTR4_WORD0_CASE_INSENSITIVE \
354 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED \
355 | FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FILEID | FATTR4_WORD0_FILES_AVAIL \
356 | FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS \
357 | FATTR4_WORD0_MAXFILESIZE | FATTR4_WORD0_MAXLINK | FATTR4_WORD0_MAXNAME \
358 | FATTR4_WORD0_MAXREAD | FATTR4_WORD0_MAXWRITE | FATTR4_WORD0_ACL)
359
360 #define NFSD4_SUPPORTED_ATTRS_WORD1 \
361 (FATTR4_WORD1_MODE | FATTR4_WORD1_NO_TRUNC | FATTR4_WORD1_NUMLINKS \
362 | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP | FATTR4_WORD1_RAWDEV \
363 | FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL \
364 | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_ACCESS_SET \
365 | FATTR4_WORD1_TIME_DELTA | FATTR4_WORD1_TIME_METADATA \
366 | FATTR4_WORD1_TIME_MODIFY | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
367
368 #define NFSD4_SUPPORTED_ATTRS_WORD2 0
369
370 /* 4.1 */
371 #ifdef CONFIG_NFSD_PNFS
372 #define PNFSD_SUPPORTED_ATTRS_WORD1 FATTR4_WORD1_FS_LAYOUT_TYPES
373 #define PNFSD_SUPPORTED_ATTRS_WORD2 \
374 (FATTR4_WORD2_LAYOUT_BLKSIZE | FATTR4_WORD2_LAYOUT_TYPES)
375 #else
376 #define PNFSD_SUPPORTED_ATTRS_WORD1 0
377 #define PNFSD_SUPPORTED_ATTRS_WORD2 0
378 #endif /* CONFIG_NFSD_PNFS */
379
380 #define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
381 NFSD4_SUPPORTED_ATTRS_WORD0
382
383 #define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
384 (NFSD4_SUPPORTED_ATTRS_WORD1 | PNFSD_SUPPORTED_ATTRS_WORD1)
385
386 #define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
387 (NFSD4_SUPPORTED_ATTRS_WORD2 | PNFSD_SUPPORTED_ATTRS_WORD2 | \
388 FATTR4_WORD2_SUPPATTR_EXCLCREAT)
389
390 /* 4.2 */
391 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
392 #define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL
393 #else
394 #define NFSD4_2_SECURITY_ATTRS 0
395 #endif
396
397 #define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
398 (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
399 FATTR4_WORD2_MODE_UMASK | \
400 NFSD4_2_SECURITY_ATTRS | \
401 FATTR4_WORD2_XATTR_SUPPORT)
402
403 extern const u32 nfsd_suppattrs[3][3];
404
nfsd4_set_netaddr(struct sockaddr * addr,struct nfs42_netaddr * netaddr)405 static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
406 struct nfs42_netaddr *netaddr)
407 {
408 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
409 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
410 unsigned int port;
411 size_t ret_addr, ret_port;
412
413 switch (addr->sa_family) {
414 case AF_INET:
415 port = ntohs(sin->sin_port);
416 sprintf(netaddr->netid, "tcp");
417 netaddr->netid_len = 3;
418 break;
419 case AF_INET6:
420 port = ntohs(sin6->sin6_port);
421 sprintf(netaddr->netid, "tcp6");
422 netaddr->netid_len = 4;
423 break;
424 default:
425 return nfserr_inval;
426 }
427 ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
428 ret_port = snprintf(netaddr->addr + ret_addr,
429 RPCBIND_MAXUADDRLEN + 1 - ret_addr,
430 ".%u.%u", port >> 8, port & 0xff);
431 WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
432 netaddr->addr_len = ret_addr + ret_port;
433 return 0;
434 }
435
bmval_is_subset(const u32 * bm1,const u32 * bm2)436 static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
437 {
438 return !((bm1[0] & ~bm2[0]) ||
439 (bm1[1] & ~bm2[1]) ||
440 (bm1[2] & ~bm2[2]));
441 }
442
nfsd_attrs_supported(u32 minorversion,const u32 * bmval)443 static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
444 {
445 return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
446 }
447
448 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
449 #define NFSD_WRITEONLY_ATTRS_WORD1 \
450 (FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
451
452 /*
453 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
454 * a writeable attribute here without also adding code to parse it to
455 * nfsd4_decode_fattr().
456 */
457 #define NFSD_WRITEABLE_ATTRS_WORD0 \
458 (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
459 #define NFSD_WRITEABLE_ATTRS_WORD1 \
460 (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
461 | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET)
462 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
463 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
464 FATTR4_WORD2_SECURITY_LABEL
465 #else
466 #define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
467 #endif
468 #define NFSD_WRITEABLE_ATTRS_WORD2 \
469 (FATTR4_WORD2_MODE_UMASK \
470 | MAYBE_FATTR4_WORD2_SECURITY_LABEL)
471
472 #define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
473 NFSD_WRITEABLE_ATTRS_WORD0
474 /*
475 * we currently store the exclusive create verifier in the v_{a,m}time
476 * attributes so the client can't set these at create time using EXCLUSIVE4_1
477 */
478 #define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
479 (NFSD_WRITEABLE_ATTRS_WORD1 & \
480 ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
481 #define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
482 NFSD_WRITEABLE_ATTRS_WORD2
483
484 extern int nfsd4_is_junction(struct dentry *dentry);
485 extern int register_cld_notifier(void);
486 extern void unregister_cld_notifier(void);
487 #else /* CONFIG_NFSD_V4 */
nfsd4_is_junction(struct dentry * dentry)488 static inline int nfsd4_is_junction(struct dentry *dentry)
489 {
490 return 0;
491 }
492
493 #define register_cld_notifier() 0
494 #define unregister_cld_notifier() do { } while(0)
495
496 #endif /* CONFIG_NFSD_V4 */
497
498 #endif /* LINUX_NFSD_NFSD_H */
499